Exercise 14 Page 479

We are given a function and asked to evaluate it for some given values. x=- 1, 2, 3This means that we should substitute - 1, 2, and 3 for x in the given function and then evaluate. Let's start with -1.

y = 3 * 5^x

Substitute

x= - 1

y = 3 * 5^(- 1)

NegOneExponentToFrac

a^(- 1)=1/a

y = 3 * 1/5

MoveLeftFacToNum

a*b/c= a* b/c

y = 3/5

Now, let's do the same thing for the rest of the values.

x	Evaluation	Result
- 1	y = 3 * 5^(- 1)	3/5
2	y = 3 * 5^2	75
3	y = 3 * 5^3	325